Electrical Stimulation of Brain using a realistic 3D Human Head Model: Improvement of Spatial Focality

A. Datta, M. Elwassif, and M. Bikson

Department of Biomedical Engineering, The City College of the CUNY, New York, NY, USA
Опубликовано в 2008

We calculated the spatial distribution of the electric fields induced in the brain during transcranial current stimulation (TCS). The spatial focality obtained using ‘concentric-ring’ configurations is investigated using a realistic MRI derived 3D finite element model of the human head.

Two disc electrode configurations were simulated using COMSOL Multiphysics. The distant-bipolar configuration, which is comparable to commonly used TCS protocols, resulted in diffuse (un-focal) modulation. The reduced concentric-ring results in higher spatial focality at the expense of increased total surface current. Superficial cortical neurons may be thus selectively targeted using a concentric-ring configuration.